US4692071A - Thread cutting machine - Google Patents

Thread cutting machine Download PDF

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Publication number
US4692071A
US4692071A US06/861,821 US86182186A US4692071A US 4692071 A US4692071 A US 4692071A US 86182186 A US86182186 A US 86182186A US 4692071 A US4692071 A US 4692071A
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US
United States
Prior art keywords
spindle
workpiece
thread cutting
spindle head
servo motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/861,821
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English (en)
Inventor
Akio Hirota
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brother Industries Ltd
Original Assignee
Brother Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Brother Industries Ltd filed Critical Brother Industries Ltd
Assigned to BROTHER KOGYO KABUSHIK KAISHA reassignment BROTHER KOGYO KABUSHIK KAISHA ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HIROTA, AKIO
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Publication of US4692071A publication Critical patent/US4692071A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G5/00—Thread-cutting tools; Die-heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G1/00—Thread cutting; Automatic machines specially designed therefor
    • B23G1/16—Thread cutting; Automatic machines specially designed therefor in holes of workpieces by taps
    • B23G1/20—Machines with a plurality of working spindles
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/182—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by the machine tool function, e.g. thread cutting, cam making, tool direction control
    • G05B19/186—Generation of screw- or gearlike surfaces
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/45—Nc applications
    • G05B2219/45216—Tapping
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/16—Cutting by use of rotating axially moving tool with control means energized in response to activator stimulated by condition sensor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/16—Cutting by use of rotating axially moving tool with control means energized in response to activator stimulated by condition sensor
    • Y10T408/165—Cutting by use of rotating axially moving tool with control means energized in response to activator stimulated by condition sensor to control Tool rotation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/16—Cutting by use of rotating axially moving tool with control means energized in response to activator stimulated by condition sensor
    • Y10T408/17—Cutting by use of rotating axially moving tool with control means energized in response to activator stimulated by condition sensor to control infeed

Definitions

  • This invention relates to thread cutting machines, and more particularly to a thread cutting machine in which the rotation of a thread cutting tool such as a screw tap is controlled according to the amount of movement of a spindle head which rotatably supports the thread cutting tool, thereby to cut the threads in a workpiece with high accuracy.
  • a tapping machine (or thread cutting machine) carries out a thread cutting operation with a screw tap (or thread cutting tool) initially abutted against a starting hole formed in a workpiece.
  • Such devices include means for rotating a spindle to which the screw tap is secured and means for moving a spindle head, which rotatably supports the spindle, vertically towards the workpiece.
  • the tapping machine unlike a drilling machine, is to cut threads having a predetermined pitch in a starting hole formed in a workpiece, and therefore as the thread cutting operation with a screw tap is advanced, the screw tap is moved in accordance with the lead angle. Accordingly, it is necessary for the tapping machine that the spindle head is moved in the axial direction in synchronization with the amount of movement per revolution of the spindle holding the screw tap.
  • a gear is replaceably interposed in a drive system adapted to move the spindle head in the axial direction.
  • the gear In replacing a screw tap for cutting threads of different pitch, the gear is also replaced, so that the spindle head is moved in the axial direction with a lead angle corresponding to the new screw tap.
  • the gear replacement system is disadvantageous because whenever the screw tap is replaced before a thread cutting operation, the gear must also be replaced by a gear suitable for the new screw tap. As a result, it is necessary to provide a number of gears according to the different screw taps.
  • An object of this invention is to eliminate the above-described difficulties accompanying a conventional tapping machine. More specifically, an object of the invention is to provide a thread cutting machine in which a spindle head moving section outputs a synchronizing signal to rotate the spindle, to which a screw tap is secured, in a speed ratio synchronous with the movement of the spindle head, thereby to accurately move the spindle head and stop it at a predetermined position to perform a thread cutting operation with high efficiency.
  • the thread cutting machine includes a workpiece supporting stand having a surface for holding a workpiece.
  • a spindle head is movably supported with respect to the workpiece supporting stand and means to move the spindle head in opposite directions toward and away from the workpiece holding surface as provided.
  • a rotatable spindle holds a thread cutting tool with the spindle being rotatably supported by the spindle head.
  • means for rotating the spindle are also included.
  • a first means is responsible to the spindle head moving means generates a signal corresponding to the movement of the spindle head.
  • a second means for rotating the spindle in accordance with the signal synchronizes the amount of movement per revolution of the spindle with the movement of the spindle head relative to the workpiece holding surface.
  • FIGURE in the accompanying drawing is an explanatory diagram, partly as a block diagram, for a description of one embodiment of this invention.
  • a column 14 is arranged vertically on one side of a workpiece supporting stand 12 laid on a table (not shown).
  • An AC servo motor 22 is provided on the upper end of the column 14.
  • the drive shaft (not shown) of the AC servo motor 22 is coupled to a threaded shaft 20, the axis of which is perpendicular to the upper surface of the workpiece supporting stand 12.
  • a slider 16 is threadably engaged with the threaded shaft 20 so that it is moved up and down with rotation of the threaded shaft 20.
  • One end of the slider 16 is secured to a tool supporting stand (or spindle head) 18 which is moved along the axis of the threaded shaft 20 as the slider 16 moves vertically.
  • Two spindles 24 and 124 are rotatably supported by the tool supporting stand 18 in such a manner that the axes of the spindles are parallel with each other and parallel to the axis of the threaded shaft 20.
  • Thread-cutting tools 26 and 126 having predetermined diameters are detachably coupled to the lower end portions of the spindles 24 and 124, respectively, the upper end portions of which are connected to the drive shafts (not shown) of the AC servo motors 28 and 128, respectively.
  • Workpieces 40 and 42 are placed on the workpiece supporting stand 12 in a manner that they are located below the threaded cutting tools 26 and 126, respectively.
  • Starting holes 44 and 144 have been previously formed by a separate machine.
  • the control circuit includes a position detecting pulse generator PG1 connected to the tool supporting stand moving the AC servo motor 22.
  • Position detecting pulse generators PG2 and PG3 are connected to the AC servo motors 28 and 128 rotate the spindles 24 and 124 respectively.
  • the pulse generator PG1 applies a position pulse corresponding to the rotational angle of the threaded shaft 20 to a deviation counter 36, and an arithmetic unit 34 outputs an instruction pulse according to the data inputted through an input unit 32.
  • the instruction pulse thus outputted is applied to the deviation counter 36.
  • the position pulse is compared with the instruction pulse.
  • the deviation value between these pulses is applied to a servo amplifier 38, to control the rotational position of the AC servo motor 22 adapted to move the tool supporting stand.
  • the position pulse applied to the deviation counter 36 from the pulse generator PG1 is further applied to frequency dividers 46 and 146, where it is frequency-divided.
  • the output pulses of these frequency dividers 46 and 146 are applied to deviation counters 48 and 148, respectively.
  • the pulse generators PG2 and PG3 output position pulses corresponding to the rotational angles of the thread cutting tools 26 and 126, respectively, and the position pulses thus outputted are applied to the deviation counters 48 and 148, respectively.
  • the position pulses thus applied are compared with the position pulses which have been applied through the frequency dividers 46 and 146, respectively.
  • the deviation values betweeen former and latter position pulses are applied to two-stage servo amplifiers 50 and 150 to control the rotation of the spindle rotating AC servo motors 28 and 128, respectively.
  • the amount of movement of the tool supporting stand 18 and the rotational frequency of the spindles 24 and 124 are determined so that the thread cutting operations are carried out with pitch corresponding to the particular thread cutting tools 26 and 126 connected to the spindles 24 and 124.
  • the amount of movement and speeds thus determined are inputted by means of the input unit 32 and by operating a start switch (not shown) threaded holes having predetermined diameters are formed in the workpieces 40 and 42, respectively.
  • the tool supporting stand moving servo motor 22 is provided with a tachometer generator TG1.
  • the output voltage of the tachometer generator TG1 is applied to the speed servo section of the servo amplifier 38.
  • a speed servo system is provided in which the output voltage is compared with the voltage conversion value of the instruction speed, and the speed of the AC servo motor 22 is controlled until the difference between the output voltage and the voltage conversion value becomes zero (0).
  • the speed servo system may be omitted.
  • the spindle rotating AC servo motors 28 and 128 are provided with tachometer generators TG2 and TG3, respectively.
  • the output voltages of the tachometer generators TG2 and TG3 are applied to the speed servo sections of the servo amplifiers 50 and 150, where they are compared with the voltage conversion values of the instruction speeds, so that the speeds of the AC servo motors are controlled until the difference between the output voltages and the voltage conversion value becomes zero (0), respectively.
  • the output voltage is also branched away and applied to a frequency divider 52.
  • a count down voltage is applied to servo amplifier 50a, 150a individually.
  • An output of deviation counter 48 (148) is applied to the servo amplifier 50a (150a).
  • servo amplifier 50a (150a) outputs a suitable voltage corresponding with a desired speed of the spindle 24 (124).
  • the output voltage of servo amplifier 50a (150a) is compared with the output of the tachometer generator TG2 (TG3) in a servo amplifier 50b (150b) and the speed of AC servo motor is controlled until the differences between the output voltage and the voltage conversion value becomes zero (0).
  • the rotation of the thread cutting tools are controlled by the respective control means according to the amount of movement of the tool supporting stand. Therefore, a plurality of workpieces can be readily threaded in a short time.
  • the rotation of the rotating drive means are controlled according to the predetermined movement of the spindle head and the spindle head can be stopped accurately at a predetermined position during thread cutting. Accordingly, workpieces in which starting holes have been cut to predetermined depth can be accurately threaded.
  • the thread cutting operation can be carried out at high speed and changeover of different thread cutters can be readily accomplished.
  • the invention is effective in increasing the thread cutting efficiency of such machines.
  • the AC servo motors are employed as the drive means.
  • the embodiment can be modified in various manners; for instance, DC control with DC servo motors may be employed.
  • the pulse generators PG are used as the position detecting means; however, resolvers or rotary encoders can be employed instead of the pulse generators.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Numerical Control (AREA)
  • Transmission Devices (AREA)
  • Automatic Control Of Machine Tools (AREA)
  • Turning (AREA)
US06/861,821 1985-06-28 1986-05-12 Thread cutting machine Expired - Lifetime US4692071A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP60-143346 1985-06-28
JP60143346A JPH0757444B2 (ja) 1985-06-28 1985-06-28 ねじ加工装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US07/065,858 Continuation US4813821A (en) 1985-06-06 1987-06-24 Thread cutting machine

Publications (1)

Publication Number Publication Date
US4692071A true US4692071A (en) 1987-09-08

Family

ID=15336650

Family Applications (2)

Application Number Title Priority Date Filing Date
US06/861,821 Expired - Lifetime US4692071A (en) 1985-06-28 1986-05-12 Thread cutting machine
US07/065,858 Expired - Lifetime US4813821A (en) 1985-06-06 1987-06-24 Thread cutting machine

Family Applications After (1)

Application Number Title Priority Date Filing Date
US07/065,858 Expired - Lifetime US4813821A (en) 1985-06-06 1987-06-24 Thread cutting machine

Country Status (5)

Country Link
US (2) US4692071A (ja)
JP (1) JPH0757444B2 (ja)
KR (3) KR910007021Y1 (ja)
DE (1) DE3621676A1 (ja)
GB (1) GB2178558B (ja)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4879660A (en) * 1987-03-31 1989-11-07 Brother Kogyo Kabushiki Kaisha Thread cutting machine with synchronized feed and rotation motors
US4941104A (en) * 1987-04-27 1990-07-10 Mitsubishi Denki Kabushiki Kaisha Numerical control apparatus for controlling a threading operation
US4985841A (en) * 1986-03-25 1991-01-15 Fanuc Ltd. Tapping control system
US5010286A (en) * 1987-09-14 1991-04-23 Fanuc Ltd. Method of synchronous control of spindle motor and feed motor
US5062744A (en) * 1988-08-03 1991-11-05 Fanuc Ltd. Apparatus for confirming movement of tap when rigid tapping
US5158404A (en) * 1989-04-07 1992-10-27 Erico International Corporation Taper thread cutting machine and method
US5184053A (en) * 1990-05-31 1993-02-02 Brother Kogyo Kabushiki Kaisha Control device for a tool driving unit
US5237251A (en) * 1990-04-26 1993-08-17 Franc Ltd. Control unit for a machine with a tapping function
US5352069A (en) * 1993-04-12 1994-10-04 Rourke Edward G Method and apparatus for a numerically controlled tapping machine
US5538369A (en) * 1994-02-17 1996-07-23 Fanuc Ltd. Machine tool with tapping function
US20100083503A1 (en) * 2008-10-03 2010-04-08 Szuba Joseph A Servo motor for actuating a mandrel while extruding helical teeth
US20100083502A1 (en) * 2008-10-03 2010-04-08 Joseph Szuba Method of forming a one piece component
US20100083723A1 (en) * 2008-10-03 2010-04-08 Joseph Szuba Multi-station dies for extruding teeth
US20100083724A1 (en) * 2008-10-03 2010-04-08 Joseph Szuba Preventing voids in extruded teeth or splines
US20100083780A1 (en) * 2008-10-03 2010-04-08 Joseph Szuba One piece ring gear-park brake drum
US20100083783A1 (en) * 2008-10-03 2010-04-08 Joseph Szuba Forming preforms and parts therefrom
US20130039707A1 (en) * 2011-08-08 2013-02-14 Fanuc Corporation Tapping machine
US20160039009A1 (en) * 2013-03-28 2016-02-11 Citizen Machinery Co. Ltd. Polygon machining device and polygon machining method
US20160045959A1 (en) * 2013-03-28 2016-02-18 (Citizen Holdings Co., Ltd.) Polygon machining device and polygon machining method
US20190064756A1 (en) * 2017-08-29 2019-02-28 Fanuc Corporation Machine learning device, control system, control device, and machine learning method
WO2021087442A1 (en) * 2019-11-01 2021-05-06 Milwaukee Electric Tool Corporation Portable pipe threader

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0332975B1 (de) * 1988-03-18 1992-08-12 Siemens Aktiengesellschaft Verfahren für das Gewindeerzeugen auf numerisch gesteuerten Automaten
CA2001646C (en) * 1988-10-28 1996-05-28 Takeo Suzuki Thermo-transfer sheet and label and manufacturing method of the same
JP2858319B2 (ja) * 1989-01-30 1999-02-17 松下電器産業株式会社 多軸同期駆動装置及び歯車加工装置
DE3930306A1 (de) * 1989-09-11 1991-03-21 Microtap Gmbh Antriebsvorrichtung fuer eine werkzeugmaschine
DE4344817C2 (de) * 1993-12-28 1995-11-16 Hilti Ag Verfahren und Einrichtung für handgeführte Werkzeugmaschinen zur Vermeidung von Unfällen durch Werkzeugblockieren
US5733198A (en) * 1994-11-18 1998-03-31 Brother Kogyo Kabushiki Kaisha Thread cutting machine and thread cutting method
JPH11245118A (ja) * 1998-03-03 1999-09-14 Brother Ind Ltd ネジ加工制御装置
TW493457U (en) * 2001-08-10 2002-07-01 Ding-Wei Ju Device for pulling thread for racket
WO2004069459A1 (ja) * 2003-02-06 2004-08-19 Mitsubishi Denki Kabushiki Kaisha ネジ切り制御方法及びその装置
CN105247424B (zh) * 2013-04-30 2018-06-08 三菱电机株式会社 数控装置
CN110114187B (zh) * 2016-09-26 2022-03-18 艾司科图像康斯博有限公司 用于控制工具的致动器及方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3346894A (en) * 1965-08-23 1967-10-17 Jerome H Lemelson Apparatus for controlling rotary and longitudinal movements of a combined tool carrying spindle
JPS4731356U (ja) * 1971-04-30 1972-12-08
US4157231A (en) * 1977-09-27 1979-06-05 The United States Of America As Represented By The Secretary Of The Air Force Hydraulic drill unit
JPS5796750A (en) * 1980-12-06 1982-06-16 Nomura Seisakusho:Kk Tapping apparatus
US4353018A (en) * 1979-08-24 1982-10-05 Fujitsu Fanuc Limited Control system for synchronized operation of machine tool motors
US4441059A (en) * 1980-12-12 1984-04-03 Fuji Seiki Machine Works, Ltd. Cutting feed sensing device

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD65970A (ja) *
DE1563766C3 (de) * 1966-10-20 1974-03-21 Siemens Ag, 1000 Berlin U. 8000 Muenchen Anordnung zum Schneiden von Gewinden bei einer numerisch gesteuerten Werkzeugmaschine
DE1627391C3 (de) * 1967-09-15 1974-06-12 Herbert Lindner Gmbh, 1000 Berlin Vorrichtung zur genauen Begrenzung des Vorschubes eines eine der Drehzahl und der Gewindesteigung entsprechend Eigenvorschubbewegung ausführenden Präzisionsgewindebohrers an einem Präzisionsbohrwerk mit programmgesteuertem maschinellem Vorschub
US3703846A (en) * 1970-11-16 1972-11-28 Lewis E Krafft Machine tool spindle and drive
US3720135A (en) * 1971-02-01 1973-03-13 Kearney & Trecker Corp Feed rate controller
US3822958A (en) * 1973-06-04 1974-07-09 Ekstrom Carlson & Co Multispindle drilling machine
JPS5413080A (en) * 1977-07-01 1979-01-31 Oki Electric Ind Co Ltd Method of forming screw thread by numerical control
JPS57189592A (en) * 1981-05-14 1982-11-20 Fanuc Ltd Synchronous operation system
DE3304644A1 (de) * 1983-02-10 1984-08-16 Siemens AG, 1000 Berlin und 8000 München Steuereinrichtung fuer das gewindebearbeiten auf numerisch gesteuerten werkzeugmaschinen (gewindegangversatz-kompensation)

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3346894A (en) * 1965-08-23 1967-10-17 Jerome H Lemelson Apparatus for controlling rotary and longitudinal movements of a combined tool carrying spindle
JPS4731356U (ja) * 1971-04-30 1972-12-08
US4157231A (en) * 1977-09-27 1979-06-05 The United States Of America As Represented By The Secretary Of The Air Force Hydraulic drill unit
US4353018A (en) * 1979-08-24 1982-10-05 Fujitsu Fanuc Limited Control system for synchronized operation of machine tool motors
JPS5796750A (en) * 1980-12-06 1982-06-16 Nomura Seisakusho:Kk Tapping apparatus
US4441059A (en) * 1980-12-12 1984-04-03 Fuji Seiki Machine Works, Ltd. Cutting feed sensing device

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4985841A (en) * 1986-03-25 1991-01-15 Fanuc Ltd. Tapping control system
US4879660A (en) * 1987-03-31 1989-11-07 Brother Kogyo Kabushiki Kaisha Thread cutting machine with synchronized feed and rotation motors
US4941104A (en) * 1987-04-27 1990-07-10 Mitsubishi Denki Kabushiki Kaisha Numerical control apparatus for controlling a threading operation
US5010286A (en) * 1987-09-14 1991-04-23 Fanuc Ltd. Method of synchronous control of spindle motor and feed motor
US5062744A (en) * 1988-08-03 1991-11-05 Fanuc Ltd. Apparatus for confirming movement of tap when rigid tapping
US5158404A (en) * 1989-04-07 1992-10-27 Erico International Corporation Taper thread cutting machine and method
US5237251A (en) * 1990-04-26 1993-08-17 Franc Ltd. Control unit for a machine with a tapping function
US5184053A (en) * 1990-05-31 1993-02-02 Brother Kogyo Kabushiki Kaisha Control device for a tool driving unit
US5352069A (en) * 1993-04-12 1994-10-04 Rourke Edward G Method and apparatus for a numerically controlled tapping machine
US5538369A (en) * 1994-02-17 1996-07-23 Fanuc Ltd. Machine tool with tapping function
US20100083780A1 (en) * 2008-10-03 2010-04-08 Joseph Szuba One piece ring gear-park brake drum
US8230597B2 (en) 2008-10-03 2012-07-31 Ford Global Technologies, Llc Forming preforms and parts therefrom
US20100083723A1 (en) * 2008-10-03 2010-04-08 Joseph Szuba Multi-station dies for extruding teeth
US20100083724A1 (en) * 2008-10-03 2010-04-08 Joseph Szuba Preventing voids in extruded teeth or splines
US20100083503A1 (en) * 2008-10-03 2010-04-08 Szuba Joseph A Servo motor for actuating a mandrel while extruding helical teeth
US20100083783A1 (en) * 2008-10-03 2010-04-08 Joseph Szuba Forming preforms and parts therefrom
US8061174B2 (en) 2008-10-03 2011-11-22 Ford Global Technologies, Llc Preventing voids in extruded teeth or splines
US8210016B2 (en) 2008-10-03 2012-07-03 Ford Global Technologies, Llc Multi-station dies for extruding teeth
US8215880B2 (en) 2008-10-03 2012-07-10 Ford Global Technologies, Llc Servo motor for actuating a mandrel while extruding helical teeth
US20100083502A1 (en) * 2008-10-03 2010-04-08 Joseph Szuba Method of forming a one piece component
US20130039707A1 (en) * 2011-08-08 2013-02-14 Fanuc Corporation Tapping machine
US8662799B2 (en) * 2011-08-08 2014-03-04 Fanuc Corporation Tapping machine
US20160039009A1 (en) * 2013-03-28 2016-02-11 Citizen Machinery Co. Ltd. Polygon machining device and polygon machining method
US20160045959A1 (en) * 2013-03-28 2016-02-18 (Citizen Holdings Co., Ltd.) Polygon machining device and polygon machining method
US9630253B2 (en) * 2013-03-28 2017-04-25 Citizen Watch Co., Ltd. Polygon machining device and polygon machining method
US9676036B2 (en) * 2013-03-28 2017-06-13 Citizen Watch Co., Ltd. Polygon machining device and polygon machining method
US20190064756A1 (en) * 2017-08-29 2019-02-28 Fanuc Corporation Machine learning device, control system, control device, and machine learning method
US11029651B2 (en) * 2017-08-29 2021-06-08 Fanuc Corporation Machine learning device, control system, control device, and machine learning method
WO2021087442A1 (en) * 2019-11-01 2021-05-06 Milwaukee Electric Tool Corporation Portable pipe threader

Also Published As

Publication number Publication date
US4813821A (en) 1989-03-21
JPH0757444B2 (ja) 1995-06-21
KR890015763U (ko) 1989-08-12
KR910007021Y1 (ko) 1991-09-20
JPS624514A (ja) 1987-01-10
GB8615379D0 (en) 1986-07-30
KR890015764U (ko) 1989-08-12
KR910000612Y1 (ko) 1991-01-31
DE3621676A1 (de) 1987-01-08
GB2178558B (en) 1990-04-04
GB2178558A (en) 1987-02-11
KR910000613Y1 (ko) 1991-01-31
KR870000458U (ko) 1987-02-20

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